Electronic tube socket



Feb. 24, 1959 ELECTRONIC TUBE SOCKET E. E. RlTTER 2,875,423

Filed Jan. 6,, 1955 .illlllllH INVENTOR. EDWIN E. RFTTER BYX g ATTORNEY a chassis plate directly through 2,875,423 ELECTRONIC TUBE SOCKET Edwin E. Ritter, Chalfonte, Pa., assignor to Hugh H. Eby, Inc., Philadelphia, Pa., a corporation of Pennsylvania This invention relates generally to means for mounting electrical apparatus and more particularly to improvements in means for mounting a receptacle for an electrical tube.

A principal object of the presentinvention is to provide such means wherein a receptacle including a socket and a shield for the socket is operatively mounted upon the medium of the shield without the use of separate securing elements.

Another object of the present invention is to provide such means wherein the shield is eifectively grounded by reason of being secured to the chassis plate through the medium of a connection which extends continuously about the body of the shield.

Still another object of the present invention is to provide such means which is exceedingly simple in design and construction and which is comparatively simple and inexpensive to manufacture.

Other objects and advantages of the present invention will appear more fully hereinafter, it being understood that said invention consists substantially in the combination, construction, location and general arrangement of parts, all as described in detail in the following specification, as shown in the accompanying drawing and as fully pointed out in the appended claims.

In the accompanying drawings:

Figure 1 is a perspective view of apparatus embodying the present, invention and showing a rec eptacle located over the mounting hole in a chassis plate preliminarily to final assembly;

; -Figure 2 is a top view of the receptacle and chassis plate of Figure 1, shown fully assembled;

Figure 3 is a vertical section on line 33 of Figure 2;

Figure 4 is a view of another apparatus embodying the present invention, the receptacle being shown in elevation prior to being secured to the chassis plate, the latter being shown ,in section; 3 I

Figure 5 is a top view of the receptacle and chassis plate shown in Figure 4; p

Figure -6 is a vertical section on line 66 of Figure 5, the receptacle being shown permanently secured to the chassis plate; and

Figure 7 is' a fragmentary sectional view illustrating a modified detail of construction.

Referring to the drawing, and particularly to Figures 1, 2 and 3, the assembly embodying the present invention comprises a rigid metal plate member 10 which forms part of a chassis and which mounts a receptacle indicated generally by the numeral 11. The receptacle 11 is provided with a shell or mounting base shield in the form of a one-piece draw metal cylindrical sleeve part 12 which has a large diameter main body section 13 and an external axially tapered annular flange 14 disposed respectively at opposite ends of the sleeve part 12 and connected together by a reduced diameter section 15 and an annular shoulder 16 which is formed by the reduced diameter section 15.

The receptacle 11 is additionally provided with a cast- U d. States Pe m O and communicating with the mounting hole 27, and theing or molded body of insulating material in the form of a socket 17 which is circular in transverse cross-section. The socket 17 has a large diameter section 18 that is interposed between a pair of reduced diameter sections 19 and 20. Extending longitudinally of the socket 17 in diametrically opposed relation are a pair of round bottomed open grooves 21,21 which separate marginal portions of the large diameter section 18 of the socket ,17 to afford arcuately shaped ribs 22 and 23.

The socket 17 is fitted into the sleeve part 12 and is positioned with the arcuate ribs 22 and 23 seated upon the annular shoulder 16 of the sleeve part 12, being thus secured against axial displacement in one direction. For securing the socket 17 against axial displacement in the opposite direction, the main body section 13 of the sleeve part 12 is inwardly staked at four circumferen tially spaced locations just above the large diameter section 18 of the socket 17. Two of the wall areas 24-24 thus inwardly offset are disposed over the arcuate rib 22 of the socket 17, and the other two wall areas 24- -24 thus inwardly offset are disposed over the arcuate rib 23 of the socket 17.

For securing the socket 17 against turning in the sleeve part 12, the portions of the reduced diameter section 15 of the sleeve part 12 which are opposed respectively to the grooves 2121 of the socket 17 are extende'd upwardly as at 25-25, the extended wall areas 25--25 be ing disposed each between a pair of opposed end portions of the arcuateribs 22 and 23 of the socket 17, and the circumferential extent of each of the wall areas 25 being sufiicient for spanning the distance between the arcuate ribs 22 and 23. The annularshoulder 16 of the sleeve part 12 arches upwardly over the wall areas 25-25 as at 2626.

When mounted upon the plate member 10, the receptacle 11 is disposed with the reduced diameter section 15 of the sleeve part 12snugly fitted in a mounting hole 27 formed in the plate member 10, and with the portion of the plate member 10 bordering the mounting hole 27 firmly gripped between the annular shoulder 16 and the annular flange 14 of the. sleeve part 12, the annular shoulder 16 being firmly seated upon the upwardly presenting face of the plate member 10 while the annular flange 14 flares outwardly in overlying relation to the downwardly presenting face of the plate member 10. For securing the receptacle 11 and particularly the sleeve part 12 against turning in the mountinghole 27, the main body section 13 of the sleeve part 12 is provided with a portion at the base thereof which is extended downwardly as at 28, the extended wall area 28 being disposed in a recess 29 formed in the plate member 10 circumferential extent of the wall area 28 being sufiicient for spanning the recess 29. The annular shoulder 16 of the sleeve part 12 extends under and around the wall area 28 as at 30.

It will be understood, of course, that the socket 17 is fitted into the sleeve part 12 preliminarily to any staking of the main body section 13 of the sleeve part 12 as at 24. In addition, since the flange 14 of the sleeve part 12 must be formed after the lower end of the sleeve part 12 is projected through the mounting hole 27 of the plate member 10, the flange 14 and the contiguous reduced diameter section 15 initially form a cylindrical collar 31 of uniform diameterthroughout its length, the diameter being sufficiently small to permit projection of the collar freely through the mounting hole 27. After projection of the collar 31 into the opening 27 with the wall area or key 28 in registry with the recess or keyway 29, the freely extending bottom end of the collar 31 is flared or otherwise expanded to securely lock the socket receptacle H to the chassis plate 10 and so provide a circumferentially continuous grounded connection between the metal parts 10 and 11. This grounded con nection greatly reduces objectionable radiation present in many high frequency electronic circuits and is especially advantageous in television circuits designed to use both U. H. F. and V. H. F. frequency bands. In this connection, the flange 14 of the sleeve part 12 may be variously formed. For example, referring to Figure 7, the flange may be curved in transverse cross-section as at 32.

The socket 17 is conventionally fitted with a set of contact members 33 and is otherwise adapted to receive anelectrical tube (not shown). It will be apparent that the orientation of the pattern of the set of contact members 33 relative to the plate member 10 is determined by the location of the recess 29 in the plate member 18, the orientation of the wall area 28 of the sleeve part 12 with respect to the wall areas 25-25 of the sleeve part 12, and the orientation of the grooves 2121 in the socket 17 with respect to the pattern of the set of contact members 33. Any desired orientation can be effected readily.

The reduced diameter sections 19 and 2d of the socket 17 respectively are substantially smaller in diameter than the main body section 13 and the reduced diameter 15 of the sleeve part 12. In addition, the top and bottom of the socket 17 are fully exposed. Furthermore, the flange 14 or 32 of the sleeve part 12 extends below the bottom of the plate member 10 a distance greater than that corresponding to the thickness of the wall of the sleeve part 12. Still further, the main body section 13 of the sleeve part 12 is outwardly staked as at 3434 to facilitate retention of a tube shield (not shown) which may be fitted over the main body section 13.

Now referring particularly to Figures 4, S and 6, the modified assembly embodying the present invention comprises a plate member 35 and a receptacle 36. The receptacle 36 is provided with a sleeve part 37 and a socket 38. The plate member 35 and the socket 33 are identical respectively with the plate member 10 and the socket 17 already described. The sleeve part 37 corresponds to the sleeve part 12 already described. However, the main body section 39 of the socket receptacle 36 is of reduced axial length and is provided at its upper end with a pair of diametrically opposed arcuately shaped flanges NP-40 which overlie respectively the arcuate'ribs 22 and 23 of the socket 38. It will be apparent that these flanges NF-4t) function similarly to the indentations 2424 of the construction shown in Figures 1 to 3 to secure the socket against axial displacement upwardly of its shielding receptacle. In all other material respects the construction of Figures 4 t0 6 is the same as that of Figures 1 to 3.

It will be understood, of course, that the present invention is susceptible of various changes and modifications which may be made from time to time without involving any departure from the general principles or 4 real spirit thereof. Accordingly, it is intended to claim the same broadly, as well as specifically, as indicated in the appended claims.

What is claimed as new and useful is:

1. In an electron tube socket assembly, a sleeve mounted socket, said socket having a face containing apertures for receiving the pins of an electron tube base when a tube is seated in said socket, an outwardly flanged peripheral ridge extending substantially completely about the circumference of the socket body in a plane parallel to said socket face, the outer edge of said peripheral ridge throughout its circumferential extent lying close adjacent to the inside surface of said sleeve with the socket face lying in a plane substantially perpendicular to the axis of said sleeve, said sleeve being of reduced cross-section immediately below said ridge and providing thereby a substantially circumferentially extending shoulder upon which said socket is supported .by said ridge, said sleeve reduced cross-section extending axially downward from said shoulder to form a skirt extending circumferentially about said socket body in radial spaced relation therefrom, whereby said socket assembly may be mounted to a chassis by inserting said sleeve skirt through a prepunched hole just large enough to accommodate said skirt with said skirt extendingv below the chassis undersurface and with. said shoulder seated on said chassis upper surface, and by then flaring outward the skirt edge. t

2. The socket assembly of claim 1 wherein said sleeve extends axially upward beyond the plane of said socket face and is indented immediately above said socket ridge to thereby clamp said ridge between said indentation and said shoulder and thereby prevent relative axial movement between said socket and said sleeve.

3. The socket assembly of claim 1 wherein a portion of the sleeve outer surface below said ridge lies in the same plane as the sleeve outer surface surrounding said ridge and forms thereby a radially extending key.

4. The socket assembly of claim 1 wherein a portion is radially reduced in at least one region of its circumferential extent and said sleeve is indented to present radially inward into said radially reduced ridge region to thereby prevent relative rotational movement between said socket and said sleeve.

OTHER REFERENCES Publication Electronics, p. 263, April 1952. 

